I have about 75 of them of various sizes and shapes. If you actually use them, you cannot leave them in a pile - they take forever to untangle.
For awhile I used zip ties, but now I roll them up and put a couple wraps of shrink wrap around them with one of those 6 inch wide handheld rolls. It holds them securely until you need them. I keep a bunch of them in my pickup box, and a bunch in my trailer toolbox, and the rest in my box truck.
It seems whenever I need them, I'm pressed for time - freezing cold and trying to strap something to the trailer. It just wouldn't work if I had to untangle them to use them. Sometimes if I use a bunch of them, it takes a week or so to find the time to wrap them back up, but I always do.